Vacuum cleaners Patent #: 3950814
ApplicationNo. 06/360499 filed on 03/22/1982
US Classes:15/325With fender or bumper, i.e., furniture guard
ExaminersPrimary: Moore, Chris K.
Attorney, Agent or Firm
International ClassA47L 9/00 (20060101)
Foreign Application Priority Data1981-04-11 DE
DescriptionThe present invention relates to a vacuum cleaner housing having a handle mount and, opposite it, a socket aswell as a covering which cushions the side surfaces of the housing.
In one known development, the vacuum cleaner housing is provided with a reinforcing steel insert and covered by a foam covering sprayed thereon. The latter in its turn is surrounded by a covering consisting of plastic. The advantage of such adevelopment is in the protection against impact. However, the large amount of material required together with the higher cost of manufacture constitute disadvantages.
The object of the invention is to develop a vacuum cleaner housing of this type in such a manner that, with a saving of material, good protection against impact is still obtained without the stability of the vacuum cleaner housing being impaired.
This object is achieved by means of a covering comprising a wall of semi-rigid material in the form of a cap, the cap being placed on the housing from the socket side, the wall extending in self-supporting manner at a distance from sidewalls ofthe housing, the cap being centered in form-engaging manner on a cylindrical surface of the socket, the cap having an edge zone on the handle-mount side, the improvement further comprising a supporting rib disposed circumferentially about the housing,and the cap being supported for longitudinal displacement in spaced position by the supporting rib.
Thereby, there is provided a vacuum cleaner housing, the protection of which against impact can be obtained at an extremely favorable cost. Furthermore, the protection against impacts can be obtained with a saving of material so that the totalweight of the vacuum cleaner housing can be reduced. This leads to easier handling of the vacuum cleaner. The covering, which is developed in the form of a cap, extends parallel to and spaced from the sidewalls of the housing, preferably maintaining adistance away of about 1 to 5 mm. One end of the cap surrounds the socket in a cooperatively shaped movement limiting manner, the socket being simultaneously used to center the cap, while the other end of the cap, namely, the edge zone on the handleside, is supported in spaced position for longitudinal displacement by a supporting rib. In this way compensation in length of the cap is possible if the cap should be deformed mechanically as a result of impact. The supporting rib may be a part eitherof the cap or of the vacuum cleaner housing. A separately applied supporting rib would also be possible. The material of which the cap is made and its formation are such that the cap always returns to its initial position. By suitable selection of thematerial of the cap and suitable dimensioning of the air gap, a variation with respect to the protection against impact can be effected. Furthermore, the cap is very effective in dampening noise.
One advantageous further development is characterized by an axial securing of the cap in the region of the latch opening of the socket. The latch opening, which is present in any event, thus fulfills a double function.
In this connection it has been found advantageous to provide in the cap wall, in the region of the insertion socket, an opening which is aligned with the latch opening in the socket and into which a resiliently depressible cup-shaped button foracting on and releasing the latch knob is inserted. A collar on the latch opening extends into the inside of the cup space. The release button, which extends into the opening in the cap wall, secures the axial position in both directions. Although therelease button is made of flexible material, it is securely held by the collar which enters into the interior of its cup-shape. The upper edge of the collar then represents the flexure region of the release button.
Structural parts can be eliminated by forming the wall of the cap continuing around the front edge of the insertion, socket into a sealing lip which extends into the socket opening. Therefore an additional sealing lip which would also have to beattached can be dispensed with.
Another advantageous feature is that an integral forceheld bridge formed of a continuous section of the housing wall is provided between the handle and the socket. Blows on the cap are therefore not transmitted directly to the handle mount.
Finally, it is also advantageous for a facing strip to extend over the edge of the cap wall, serving to receive the housing end of the filter.
With the above and other objects and advantages in view, the present invention will become moreclearly understood in connection with the detailed description of a preferred embodiment, when considered with the accompanying drawings, of which:
FIG. 1 shows, partly in elevation and partly in section, a vacuum cleaner housing covered by a cap;
FIG. 2 is a longitudinal section through a vacuum cleaner housing in the region of the edge of the cap; and
FIG. 3 is a longitudinal section through the insertion socket with cap wall surrounding it in in a self-holding manner.
The vacuum cleaner housing 1 includes housing sidewalls 2 which terminate in a socket 3. Within the vacuum cleanerhousing 1 there is a vacuum cleaner motor 4, shown diagrammatically. Furthermore, the vacuum cleaner housing 1, which is made of suitable plastic, has an internal handle mount 5 in the form of a bushing molded thereon. It receives, held by thecooperative shape of the respective parts, a handle 6, which continues in customary manner into a handle grip (not shown). In this way, a force-held one-piece bridge is created between the insertion socket 3 and the handle mount 5.
At its end opposite the socket 3, the vacuum cleaner housing 1 is provided with a circumferential supporting rib 7. The end thereof facing the socket 3 forms a run-on bevel 8.
A cap 9 which forms a covering is placed onto the vacuum cleaner housing 1. The wall 10 of the cap is made of semi-rigid material and is spaced from the housing walls 2. The edge zone 11 of the cap on the handle-mount side lies inlongitudinally displaceable manner over the supporting rib 7. The easy placing-on of the edge zone 11 is assured by the run-on bevel 8 of the supporting rib 7.
The cap wall 10' which lies in the region of the socket 3 is centered in form-engaging manner (i.e., held to an extent in a movement limiting manner by the cooperative shape of the parts) on the cylindrical surface of the socket 3. This meansthat the air space between the self-supporting wall 10, the cap 9 and the housing sidewalls 2 ends in front of the socket 3. At that place the socket is provided at its throat with a collar 12 so that the cap wall 10" which extends at right angles tothe socket 3 is held at a distance from the vacuum cleaner housing 1; see FIG. 1.
The edge region 11 extends up to a distance in front of an edge 7' of the supporting rib 7 so that in the event of mechanical deformation of the cap 9, compensation in length is assured.
A facing strip 13 extends over the edge region 11 of the cap 9, forming the receiver for the housing-side end of a filter, not shown.
The wall 10' of the cap 9 which surrounds the socket 3 is extended around the front edge 14 (FIG. 3) of the socket 3 and continues there into a sealing lip 16 which extends into the socket opening 15. In this way the cap is axially secured inposition in one direction.
For the additional securing of the cap 9 in both directions an opening 17 is provided in the cap wall 10' In the region of the socket 3. This opening is aligned with a latch opening 18 in the socket 3. Within the opening 17 there is inserted acup-shaped button 19 which can be pushed resiliently inward and into the interior cup-shaped space 20 in which there penetrates a collar 21 extending from the socket 3. The cup edge 22 of the release button 19 continues into an outwardly directed flange23 which is located below the edge region Z of the opening 17. The release button 19 is thus reliably secured in position.
If the connection socket 24 of a vacuum nozzle, as shown in dash-dot line in FIG. 3, is inserted into the socket 3, its locking (or latch) knob 25 engages into the latch opening 18 of the socket 3 which is surrounded by the collar 21. Thissocket 24 can be pulled out only after pushing in the flexible release button 19, its ribs 26, which extend on the inside of the cup down to the latch knob, moving the latch knob 25 into the released position.